Alloy



Patented June 20, 1944 UNITED STATES PATENT OFFICE ALLOY Jacob Trantin,Jr., Youngstown, Ohio No! Drawing. Application January 5, 1942,

Serial,No..425,665

2 Claims.

This invention relates to ferrous alloys in the steel range which may bereadily cast, and which have high wear-resistance and freedom fromrosion-resistance, and lack of susceptibility of metal deposit thereon.

Another obj ect'of my invention is the provision of an improved ferrousalloy including chromium,

copper, coba1t, sili-con, manganese, and molybdenumi x Another object ofmy invention is to provide or working hot metal or the like whicharticles have a greatly prolonged life over that of known members now inuse for this purpose, and characterized by lack of susceptibility toscale pick-up and. by corrosion and wear-resistance.

improved articles for piercing, guiding, forming I The foregoing andother objects of my invention are achieved by the provision of an alloyincluding .20 to 2.00 per cent carbon, about 5.00 to about 30.00 percent chromium, 5.00 to about 15.00 per cent copper, 1.00 to about 10.00per cent cobalt, .10.to about 3.00 per cent molybdenum,

.30 to 1.50 per cent silicon, .05 to 1.75 per cent manganese, up to 1.50per cent vanadium, and the. remainder substantially all iron.

I may keep. the limits of my improved alloy as follows: carbon .40 to.99 per cent, chromium 11.0' to 18.0. per cent, copper 6.0 to 9.0 percent,

cobalt 2.5 to 4.5 per cent, molybdenum .5 to 1.5

per cent, silicon .3 to 1.5 per cent, vanadium .1 to

' .50 per cent, manganese .4 to .9 per cent, and

the remainder substantially all iron.

One typical heat of the alloy of my invention which possesses theimproved. characteristics above set forth comprises the followingcomposition: carbon about .8 per cent, chromium about 15.0 per cent,copper about 7.5 per cent,

cobalt about 4.0 per cent, molybdenum about .75

other that when the cobalt content is increased 'themolybdeaum contentmay be reduced, and, when the molybdenum content is increased thecobaltcontent may be reduced. In any event, it is advisable to keep thecombined molybdenum and cobalt contents in the alloy between about 4.00and about 10.00 per cent of the total alloying ingredients.

Further, the manganese and chromium present in the alloy bear a relationto each other so that if the manganese content is increased above thelimits hereinabove noted then the chromium content can be reduced'by anamount substantially equal to the increase in the manganese content. Inany event, the combined amounts of chromium and manganese present in thealloy should be within the limits of between-about 5.00 and about 30.00per cent. I have found, also, that instead of using vanadium intheamounts indicated that I may employ aluminum in similar amounts toachieve substantially the same results in the alloy.

From the foregoing it will be recognized that the objects of myinvention have been achieved and that I have provided a castable ferrousalloy.

particularly adapted to act as a guiding or forming member for hot metaland t e like, and characterized by wear-resistance, corrosion-resistanceand long life without the deposition of scale thereon. I

Although in accordance with the patent statutes, I have particularlydescribed my invention, it will be understood that 1am not to belimitedthereto or thereby, but that the scope of my invention is defined in theappended claims.

I claim:

. 1. A ferrous alloy comprising about .8 percent carbon, about 15.00 percent chromium, about 7.50 per cent copper, about 4.0 per cent'cobalt,about .75 per cent molybdenum, about .80 per cent silicon, about .25 percent vanadium, about .60 per cent manganese, and the remaindersubstantially all iron, said alloy being characterized bywear-resistance, corrosion resistance, and freedom from hot metal scalepick-up.

2. A ferrous alloy having an analysis including:

carbon .40 to .99 per cent: chromium 11.00 to 18.00 per cent; copper6.00 to 9.00 per cent; cobalt 2.5 to 4.5 per cent; molybdenum .5 to 1.5per cent; silicon .3 to 1.5 per cent, vanadium .1 to .50 per cent;manganese .4 to'.9 per cent; and the remainder substantially all iron,said alloy being characterized by wear-resistance.

